#!/usr/bin/env python3
"""
Auto-vetting pipeline for CmdForge tool submissions.

Combines scrutiny (quality checks) and similarity (duplicate detection)
to automatically triage incoming tools:
- Auto-approve: High quality, no duplicates
- Auto-reject: Low quality or exact duplicates
- Review queue: Needs human review

Usage:
    # Vet a single tool
    python scripts/vet_pipeline.py path/to/tool/config.yaml

    # Vet with custom thresholds
    python scripts/vet_pipeline.py --approve-threshold 0.85 path/to/tool/config.yaml

    # Process all tools in import directory
    python scripts/vet_pipeline.py --batch /tmp/fabric-import/

    # Output detailed JSON report
    python scripts/vet_pipeline.py --json path/to/tool/config.yaml
"""

import argparse
import json
import sys
from dataclasses import dataclass, asdict
from enum import Enum
from pathlib import Path
from typing import Optional

# Import our vetting modules
from scrutiny import (
    VetResult as ScrutinyResult,
    VetReport,
    load_tool_config,
    vet_tool,
)
from similarity import (
    ToolText,
    SimilarityMatch,
    extract_tool_text,
    load_corpus,
    compute_tfidf,
    find_similar,
    DUPLICATE_THRESHOLD,
    SIMILAR_THRESHOLD,
)


class PipelineDecision(Enum):
    """Final pipeline decision."""
    AUTO_APPROVE = "auto_approve"
    AUTO_REJECT = "auto_reject"
    NEEDS_REVIEW = "needs_review"
    ERROR = "error"


@dataclass
class PipelineResult:
    """Complete pipeline result for a tool."""
    tool_name: str
    tool_path: str
    decision: PipelineDecision
    reason: str
    scrutiny_report: Optional[VetReport] = None
    similarity_matches: list = None
    suggestions: list = None

    def __post_init__(self):
        if self.similarity_matches is None:
            self.similarity_matches = []
        if self.suggestions is None:
            self.suggestions = []

    def to_dict(self) -> dict:
        d = {
            "tool_name": self.tool_name,
            "tool_path": self.tool_path,
            "decision": self.decision.value,
            "reason": self.reason,
            "suggestions": self.suggestions,
        }
        if self.scrutiny_report:
            d["scrutiny"] = self.scrutiny_report.to_dict()
        if self.similarity_matches:
            d["similar_tools"] = [m.to_dict() for m in self.similarity_matches]
        return d


# Pipeline thresholds
DEFAULT_APPROVE_THRESHOLD = 0.8
DEFAULT_REJECT_THRESHOLD = 0.3


def run_pipeline(
    tool_path: Path,
    corpus_dir: Path,
    approve_threshold: float = DEFAULT_APPROVE_THRESHOLD,
    reject_threshold: float = DEFAULT_REJECT_THRESHOLD,
) -> PipelineResult:
    """Run the complete vetting pipeline on a tool."""

    # Load tool config
    config = load_tool_config(tool_path)
    if not config:
        return PipelineResult(
            tool_name="unknown",
            tool_path=str(tool_path),
            decision=PipelineDecision.ERROR,
            reason=f"Could not load tool config from {tool_path}",
        )

    tool_name = config.get("name", "unknown")

    # Phase 1: Scrutiny (quality checks)
    scrutiny_report = vet_tool(config, str(tool_path))

    # Phase 2: Similarity check
    tool_text = extract_tool_text(config, str(tool_path))
    corpus = load_corpus(corpus_dir) if corpus_dir.exists() else []

    similarity_matches = []
    if corpus:
        all_tools = corpus + [tool_text]
        compute_tfidf(all_tools)
        similarity_matches = find_similar(tool_text, corpus, threshold=0.5)

    # Phase 3: Decision logic
    decision, reason, suggestions = make_decision(
        scrutiny_report,
        similarity_matches,
        approve_threshold,
        reject_threshold,
    )

    return PipelineResult(
        tool_name=tool_name,
        tool_path=str(tool_path),
        decision=decision,
        reason=reason,
        scrutiny_report=scrutiny_report,
        similarity_matches=similarity_matches,
        suggestions=suggestions,
    )


def make_decision(
    scrutiny: VetReport,
    similarity_matches: list[SimilarityMatch],
    approve_threshold: float,
    reject_threshold: float,
) -> tuple[PipelineDecision, str, list[str]]:
    """Make final decision based on scrutiny and similarity results."""

    suggestions = list(scrutiny.suggestions) if scrutiny.suggestions else []
    score = scrutiny.overall_score

    # Check for exact duplicates first
    duplicates = [m for m in similarity_matches if m.match_type == "duplicate"]
    if duplicates:
        dupe = duplicates[0]
        return (
            PipelineDecision.AUTO_REJECT,
            f"Duplicate of existing tool '{dupe.tool2_name}' ({dupe.similarity:.0%} match)",
            suggestions + [f"Consider updating {dupe.tool2_name} instead of creating a new tool"],
        )

    # Check for very similar tools
    similar = [m for m in similarity_matches if m.match_type == "similar"]
    if similar:
        # If high quality + similar, might be an improved version - needs review
        if score >= approve_threshold:
            sim = similar[0]
            return (
                PipelineDecision.NEEDS_REVIEW,
                f"High quality but similar to '{sim.tool2_name}' ({sim.similarity:.0%})",
                suggestions + [f"Review whether this improves on {sim.tool2_name}"],
            )
        else:
            sim = similar[0]
            return (
                PipelineDecision.NEEDS_REVIEW,
                f"Similar to existing tool '{sim.tool2_name}' ({sim.similarity:.0%})",
                suggestions + [f"Consider if this duplicates {sim.tool2_name}"],
            )

    # No duplicates or very similar tools - decide based on quality
    if scrutiny.result == ScrutinyResult.REJECT or score < reject_threshold:
        return (
            PipelineDecision.AUTO_REJECT,
            f"Quality score too low ({score:.2f} < {reject_threshold})",
            suggestions,
        )

    if scrutiny.result == ScrutinyResult.APPROVE and score >= approve_threshold:
        return (
            PipelineDecision.AUTO_APPROVE,
            f"High quality score ({score:.2f}) with no similar tools",
            suggestions,
        )

    # Middle ground - needs review
    return (
        PipelineDecision.NEEDS_REVIEW,
        f"Quality score {score:.2f} - needs human review",
        suggestions,
    )


def print_result(result: PipelineResult, verbose: bool = False):
    """Print pipeline result to console."""
    decision_emoji = {
        PipelineDecision.AUTO_APPROVE: "✅",
        PipelineDecision.AUTO_REJECT: "❌",
        PipelineDecision.NEEDS_REVIEW: "⚠️",
        PipelineDecision.ERROR: "💥",
    }

    decision_color = {
        PipelineDecision.AUTO_APPROVE: "\033[92m",  # Green
        PipelineDecision.AUTO_REJECT: "\033[91m",   # Red
        PipelineDecision.NEEDS_REVIEW: "\033[93m",  # Yellow
        PipelineDecision.ERROR: "\033[91m",         # Red
    }

    reset = "\033[0m"
    emoji = decision_emoji.get(result.decision, "❓")
    color = decision_color.get(result.decision, "")

    print(f"\n{emoji} {color}{result.tool_name}: {result.decision.value.upper()}{reset}")
    print(f"   {result.reason}")

    if verbose:
        print(f"   Path: {result.tool_path}")

        if result.scrutiny_report:
            print(f"\n   Quality Scores:")
            for score in result.scrutiny_report.scores:
                bar = "█" * int(score.score * 10) + "░" * (10 - int(score.score * 10))
                print(f"      {score.criterion:12} [{bar}] {score.score:.2f}")

        if result.similarity_matches:
            print(f"\n   Similar Tools:")
            for match in result.similarity_matches[:3]:
                print(f"      • {match.tool2_name} ({match.similarity:.0%} {match.match_type})")

        if result.suggestions:
            print(f"\n   Suggestions:")
            for suggestion in result.suggestions[:5]:
                print(f"      • {suggestion}")


def main():
    parser = argparse.ArgumentParser(
        description="Run auto-vetting pipeline on CmdForge tools",
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog=__doc__
    )

    parser.add_argument(
        "path",
        type=Path,
        nargs="?",
        help="Tool config file or directory to vet"
    )
    parser.add_argument(
        "--batch",
        type=Path,
        metavar="DIR",
        help="Process all tools in directory"
    )
    parser.add_argument(
        "--corpus",
        type=Path,
        default=Path.home() / ".cmdforge",
        help="Directory of existing tools for comparison (default: ~/.cmdforge)"
    )
    parser.add_argument(
        "--approve-threshold",
        type=float,
        default=DEFAULT_APPROVE_THRESHOLD,
        help=f"Score threshold for auto-approve (default: {DEFAULT_APPROVE_THRESHOLD})"
    )
    parser.add_argument(
        "--reject-threshold",
        type=float,
        default=DEFAULT_REJECT_THRESHOLD,
        help=f"Score threshold for auto-reject (default: {DEFAULT_REJECT_THRESHOLD})"
    )
    parser.add_argument(
        "--json",
        action="store_true",
        help="Output as JSON"
    )
    parser.add_argument(
        "--verbose", "-v",
        action="store_true",
        help="Show detailed output"
    )

    args = parser.parse_args()

    if not args.path and not args.batch:
        parser.error("Specify a tool path or use --batch")

    results = []

    if args.batch:
        # Batch mode
        batch_dir = args.batch
        if not batch_dir.exists():
            print(f"Error: Directory {batch_dir} does not exist", file=sys.stderr)
            return 1

        print(f"Processing tools in {batch_dir}...")

        for entry in sorted(batch_dir.iterdir()):
            config_file = None
            if entry.is_dir():
                config_file = entry / "config.yaml"
            elif entry.suffix in [".yaml", ".yml"]:
                config_file = entry

            if config_file and config_file.exists():
                result = run_pipeline(
                    config_file,
                    args.corpus,
                    args.approve_threshold,
                    args.reject_threshold,
                )
                results.append(result)
    else:
        # Single tool mode
        result = run_pipeline(
            args.path,
            args.corpus,
            args.approve_threshold,
            args.reject_threshold,
        )
        results.append(result)

    # Output
    if args.json:
        output = [r.to_dict() for r in results]
        print(json.dumps(output, indent=2))
    else:
        for result in results:
            print_result(result, args.verbose)

        # Summary
        if len(results) > 1:
            approved = sum(1 for r in results if r.decision == PipelineDecision.AUTO_APPROVE)
            rejected = sum(1 for r in results if r.decision == PipelineDecision.AUTO_REJECT)
            review = sum(1 for r in results if r.decision == PipelineDecision.NEEDS_REVIEW)
            errors = sum(1 for r in results if r.decision == PipelineDecision.ERROR)

            print(f"\n{'═' * 50}")
            print(f"Pipeline Summary: {len(results)} tools processed")
            print(f"  ✅ Auto-approved: {approved}")
            print(f"  ⚠️  Needs review: {review}")
            print(f"  ❌ Auto-rejected: {rejected}")
            if errors:
                print(f"  💥 Errors: {errors}")

    # Return codes
    has_rejected = any(r.decision == PipelineDecision.AUTO_REJECT for r in results)
    has_review = any(r.decision == PipelineDecision.NEEDS_REVIEW for r in results)

    if has_rejected:
        return 2
    elif has_review:
        return 1
    return 0


if __name__ == "__main__":
    sys.exit(main())